Siphon pump



J. KRAUS SIPHON PUMP March 5, 1957 Filed June 25, 1952 INVENTOR 1 v T A/m KRAus SIPHON PUMP Johann Kraus, Vienna, Austria, assignor of one-half to Leo Czermak, Innsbruck, Austria Application June 25, 1952, Serial No. 295,385 Claims priority, application Austria July 4, 1951 4 Claims. (Cl. 103-188) The invention relates to a siphon device having a piston which is movable in a cylinder and is fixed on an axially movable guide tube, which extends through the piston and carries a shut-E valve at its end protruding out of the cylinder. The operation of a siphon device is wellknown. A siphon is a tube bent to form two legs of unequal length by which a liquid can be transferred to a lower level over an intermediate elevation by atmospheric pressure forcing the liquid up the shorter branch of the pipe immersed in it, while the excess of weight in the longer branch, after the liquid has been sucked over the elevation, causes a flow to the lower level over the elevation.

The siphon device according to the present invention is intended to be located in the longer branch of the pipe and serves the purpose of sucking the liquid over the elevation in the suction line. This is carried out by closing the valve device and by pulling in the same manual operation the piston in the direction required for sucking the liquid over the elevation which is located in the suction line connected to an inlet in the cylinder. Thereupon the outlet can be directed to a bottle to be filled, and the valve opened, and then again be closed, as required. All these known siphon devices suffer from leaks at thepiston whereby the intake of the siphon device is reduced. Moreover, the shut-off valves are soon worn out and in need of repair owing to the coarse thread previously used for opening and closing them.

According to the invention a structure is provided which is superior to the known siphon device of this type as regards suction force achievable, and which, moreover, is of longer service life than the same and primarily ensures a perfect functioning of the shut-off valve.

This new and very advantageous structure resides according to the invention in that the shut-off valve consists of a gate valve which is axially movable between stops along the liquid tube, and which at the same time serves as a handle for axially moving the piston and as such performs before the piston forward stroke, a move ment in the respective direction to open the passage for air or liquid.

Thus the opening of the liquid passage through the siphon device and the movement of the piston can be effected by successive equidirectional movements so that the construction and operation are substantially simplified.

This basic measure is supplemented by a number of further design features, which will be dealt with accurately in the subsequent description.

In the accompanying drawings an embodiment of the siphon device constructed according to the invention is shown by way of example in Fig. 1 in longitudinal section. Figs. 2 and 3 are perspective views of the plug and its lock nut.

The cylinder 1 is closed at both ends in the manner known by end walls 2, 3, one of which has an intake pipe 4 for the suction line (not shown), whereas the other end wall has a central opening 5 for the axially movable Patent 2,733,715 Patented Mar. 5,1957

guide tube 6 serving as a piston rod. The piston consists of two disks 7, 8 which are screwed to the end of the guide tube 6 and hold a packing ring 9 from both sides. The diameter of the two disks forming the piston is somewhat less than the internal diameter of the rings 10, 11 projecting from the two end walls 2, 3 into the cylinder internal space so that when the piston 7 to 9 is reciprocating only its packing ring 9 will engage with the annular projections 10, 11 of the cylinder end walls 2, 3 to damp the piston impact and seal the cylinder shell against one of the cylinder end walls in the end positions of the piston.

The outer end of the guide tube 6 is tightly sealed by a plug 12 screwed into its female thread, and is provided immediately in front thereof with several, e. g., three, passage openings 13 radially extending through the tube wall and of such direction as to ensure a deflection of the liquid stream from the guide tube at an angle which remains as small as possible. The deflection of the liquid through the passage openings 13 is promoted by a pyramid-shaped plug top 14, the pyramid faces of which lie opposite to the passage openings 13. The end of the plug 12 opposite to the pyramid 14 forms a cone top 15 and serves to discharge the liquid stream without disturbance. The plug 12 is secured by a screw nut 16 screwed to it and supported on the end face of the guide tube 6. This nut 16 has three stops 17 (Fig. 3) radially projecting from its periphery and staggered in a circle by deg. The guide tube has mounted on its end an axially movable gate valve,flwhich,consists of two parts 18, 19 that can be screwed together, the part 18 consisting of a stuflingbox and as such being provided with a packing insert 20 of well sliding though excellently sealing mate rial, such as Mipulan, with or without felt filler. A thrust ring 21 is forced by means of the other gate valve part 19 against this packing so that the packing encloses the guide tube with a pressure which ensures a good, liquid-tight seal. The length of the packing is such that in the closed position of the gate valve it seals the passage openings 13 completely and tightly. By screwing the two parts 18, 19 of the gate valve together more or less tightly, the sealing pressure of the packing may be regulated. The part 19 of the gate valve has a cylinder shell the length of which corresponds to the gate valve axial movement and which is continued by a conical shell and finally by an outlet part. Together with the end of the guide tube and the cone top 15, the cylinder and conical shells form an annular guide passage 23 which is conically constricted at its lower end and through which the liquid may flow without turbulence to the outlet 24 and emerge from the same in a closed jet. When the passage openings are open, the conical shell part of the gate valve will bear on the stops 17, which ensure the necessary passage cross section for the liquid. In the closed position of the gate valve the thrust ring 21 bears with its bevelled face 22 on the countershaped faces of the stops 17. Thus the stops 17 delimit the movement of the gate valve 18, 19 on the guide tube 6 in opening and closing the passage openings 13.

The function of the siphon device is as follows:

To suck off the air in the suction line, the gate valve 18, 19 is seized with the hand and vigorously pulled down out of the position shown in Fig. 1 to cause the gate valve 18, 19 first to advance alone, so as to close the passage openings 13, and, when the thrust ring 21 has met the stops 17, to continue its movement together with the guide tube 6 and the piston 7, 8, 9 until the piston packing meets the end wall. Due to this movement of the piston the volume of the suction chamber formed by the piston and the cylinder is increased so that liquid enters through the inlet 4 into the cylinder, while the air behind the piston 8, 9 is expelled through the opening 5 since there is a certain play between the tube 6 and the cylinder wall 3. Thereupon the valve device 18, 19 is pushed back until its upper portion 19 engages the stop 17 in the position of Fig. 1. The open valve 18, 19 permits a continuous flow of liquid through the cylinder, the tube 6, and the opening 24 in a siphon action. The discharge of the liquid may be interrupted at any time by the gate valve. The renewed opening of the liquid passage 13 does not require another piston movement. If the vacuum necessary for conveying the liquid cannot be produced in the suction line by a single piston stroke, the piston must be reciprocated quickly several times until the liquid flows into the container.

It may be mentioned that the plug 12 may be coneshaped at both ends and may form itself the carrier of the stops 17.

I claim: I

1. In a siphon device, in combination, an elongated tubular means open at both ends, and having one open end adapted to communicate with a siphon, said tubular member being adapted to be connected to a reciprocable pump member the other end of said tubular means being formed with radial passages; an actuating sleeve-shaped grip member slidably mounted on said other end of said tubular means and defining with the same an annular space communicating with said passages, said actuating sleeve-shaped grip member having two axially spaced inner abutments and an outlet portion located in said one direction forwardly of said other end of said tubular means; a plug threadedly secured to said other end of said tubular means and closing the same, said plug having on each end thereof a conical portion, one of said conical portions being located within said tubular means in the region of said passages, and the other conical portions projecting into said outlet portion of said actuating grip member; stop means secured to said plug member and radially projecting from the same into said annular space; and an annular packing means located in said annular space, said actuating sleeve-shaped grip member being reciprocable in one axial direction to a closing position in which said annular packing closes said passages and in which one of said abutments engages said stops,

and in a direction opposite to said one direction to an open position in which said passages communicate through said annular space with said outlet portion.

2. In a siphon device, in combination a conduit means having two open ends, one of said open ends being adapted to communicate with a siphon; a pump member secured to said one open end; a valve device mounted at the other open end of said conduit means for closing and opening said other open end of said conduit means; and a valve actuating manually operated member mounted on said conduit means reciprocable relative to the same, said valve actuating member closing said valve device when moved relative to said conduit means toward said other open end of the same and opening said valve device when moved on said conduit means away from said other open end of the same, the arrangement being such that manual movement of said valve actuating member toward said other open end will first result in closing of said valve device and then in movement of said conduit means for actuation of the pump member so as to produce suction, while movement of said valve actuating member away from said other open end will result in opening said valve device permitting flow through said conduit means and said opened valve device in a siphon action.

3. in a siphon device, in combination, a conduit means having twoopen ends, one of said open ends being adapted to communicate with a siphon; a pump member mounted on said conduit means reciprocable relative to the same, said valve actuating grip member closing said valve device when moved relative to said conduit means toward said other open end of the same and opening said valve device when moved on said conduit means away from said other open end of the same, the arrangement being such that manual movement of said valve actuating grip member toward said other open end will first result in closing of said valve device and then in movement of said conduit means for actuation of the pump member so as to produce suction, while movement of said valve actuating grip member away from said other open end will result in opening said valve device permitting flow through said conduit means and said opened valve device in a siphon action.

4. In a siphon device, in combination, a conduit means having two open ends, one of said open ends being adapted to communicate with a siphon; a pump member secured to said one open end; a valve device mounted at the other open end of said conduit means for closing and opening said other open end of said conduit means; a valve actuating manually operated grip member mounted on said conduit means reciprocable relative to the same, said valve actuating grip member closing said valve device when moved relative to said conduit means toward said other open end of the same and opening said valve device when moved on said conduit means away from said other open end of the same, the arrangement being such that manual movement of said valve actuating member toward said other open end will first result in closing of said valve device and then in movement of said conduit means for actuation of the pump member so as to produce suction, while movement of said valve actuating grip member away from said other open end will result in opening said valve device permitting flow through said conduit means and said opened valve device in a siphon action; and stop means on said conduit means engaging said valve actuating grip member in two end positions of the same.

References Cited in the file of this patent UNITED STATES PATENTS Great Britain Mar. 29, 1950 

